The invention relates to a process for preparing a wheelchair frame (7) comprising: a) preparing parts or segments (4) of the wheelchair frame from a sacrificial material; b) applying a curable lightweight material to the parts or segments (4) obtained in step a); c) curing the parts or segments (4) obtained in step b); d) removing the sacrificial material in order to obtain hollow frame parts or hollow frame segments of the wheelchair made from the curable lightweight material.